Ever get stuck choosing the right logic chip combination or voltage level translator? Give up the hunt and create your own custom logic chip. CPLDs can give you the logic you need, with the pinout you want, while saving board space and board revisions.

Development boards from Dangerous Prototypes will help you build your first custom logic chip using simple schematic entry, Verilog, or VHDL.

CoolRunnerII

The CoolRunner-II family is newer than the XC9500XL, and has a few extra features like multiple IO voltage banks for voltage translation, internal pull-up resistors and pin keepers and a clock divider. Requires a 1.8volt core supply and a 1.2-3.3volt IO pin supply.

VHDL

Plunify

Plunify is a cloud-based compiler for Xilinx and Altera chips. The CPLD examples are already loaded, all you have to do is sign up for a free account and copy the tutorial from the add IP tab. Unfortunately it no longer supports Xilinx chips.